Resistors
Understand resistance value, tolerance, power rating and selection.
Component reference
Practical selection and use of common electronic parts.
Each component guide combines selection rules, common pitfalls and a next step.
First value: every tool works without an account, and guides link directly to calculations.
All pages in this category
Capacitors
Capacitor types, polarity, voltage rating and common applications.
Diodes and LEDs
Forward direction, voltage drop and safe LED drive.
Bipolar transistors
Basics of NPN, PNP, base current and transistor switching.
MOSFETs
Selecting a logic-level MOSFET, RDS(on) and gate drive.
Inductors and chokes
Inductance, saturation current and use in filters and converters.
Relays
Coil, contacts, flyback diode and safe microcontroller control.
Connectors and wiring
Choosing connectors for current, mating cycles and environment.
Breadboards
Connection layout, current limits and common prototyping mistakes.
Bench power supplies
CV/CC modes, current limiting and safe prototype startup.